Latest TCS Aptitude Question SOLUTION: In a stream running at 2 kmph, a motorboat goes 6 km upstream and back again to the starting point in 33 minutes. Find the speed of the motorboat in still water.

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In a stream running at 2 kmph, a motorboat goes 6 km upstream and back again to the starting
point in 33 minutes. Find the speed of the motorboat in still water.

Asked In TCS shyamjee kumar (11 years ago)

Unsolved Read Solution (3)

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Read Solution (3) :

Preeti  (11 years ago)

Let the speed of the motorboat in still water be x kmph.
Then, speed downstream = (x + 2) kmph.
Speed upstream = (x - 2) kmph.
:. 6/(x + 2) + 6/(x - 2) = 33/60 0r 11X2 – 240x – 44=0
11X2 – 242X + 2X –44 =0 or 11x(x – 22) + 2(x – 22) = 0
or (x-22)(11x+2)=0 or x=22.
:. Speed of motorboat in still water = 22 kmph.

Is this solution Helpfull? Yes (44) | No (7)  

raviranjan  (8 years ago)

6/(x+2) + 6(x-2)=33/60
find the value of x.

Is this solution Helpfull? Yes (1) | No   

vivek kumar  (7 years ago)

Let the speed of the motorboat in still water be x kmph.
Then, speed downstream = (x + 2) kmph.
Speed upstream = (x - 2) kmph.
:. 6/(x + 2) + 6/(x - 2) = 33/60 0r 11X2 – 240x – 44=0
11X2 – 242X + 2X –44 =0 or 11x(x – 22) + 2(x – 22) = 0
or (x-22)(11x+2)=0 or x=22.
:. Speed of motorboat in still water = 22 kmph

Is this solution Helpfull? Yes | No   

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